<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

    <script>
        let students = [
            { name: '小明', age: 18, sex: '男', hometown: '河北省' },
            { name: '小红', age: 19, sex: '女', hometown: '河南省' },
            { name: '小刚', age: 17, sex: '男', hometown: '山西省' },
            { name: '小丽', age: 18, sex: '女', hometown: '山东省' },
            { name: '小强', age: 18, sex: '男', hometown: '北京市' }
        ]

        // console.log(students[2].age)

        for (let i = 1; i < students.length; i++) {
            if (students[i] === '小刚') {
                console.log(students[i].age)
            }
        }
    </script>
</body>

</html>